Cushion device for nigger-bars.



W. A. HARROLD.

CUSHION DEVICE FOR NIGGER BARS. APPLICATION FILED JULY 24. 1914.

11 43,Q67, Patented June 15, 1915;

I g M lwmtoz f@%%% my THE NORRIS PETERS C0), FHOTO LITHO-, WASHINGTONv D, C.

WILLIAM A. HARROLD, OF WAUSAU, WISCONSIN.

CUSHION DEVICE FOR NIGGER-BARS.

Specification of Letters Patent.

Patented June 15, 1915.

Application filed July 24, 1914. Serial No. 852,909.

bars operated by power to turn the log and has particular application to that class of devices disclosed by the patent to Quinn, Se-

rial No. 6 17 ,760, April 17 1900, the present invention being in the nature of an improvement upon the device disclosed in such patent. H

In carrying out the present invention, it is my purpose to improve and simplify the general construction of this class of cushion stops and to provide a stop whereby the fore and aft movements of the nigger bar will be effectively cushioned so that the associated mechanism will be relieved of shock or Jar.

It is also my purpose to provide a device of the class described which will embrace the desired features of simplicity, efliciency and durability, which may be manufactured and marketed at a minimum expense and which when installed will operate effectively for its intended purpose.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claim.

In the accompanying drawing: Figure 1 is a side elevation of a cushioning device constructedin accordance with the present invention, and mounted upon a log deck. Fig. 2 is a top plan view of the cushion stop. Fig. 3 is a cross sectional view therethrough. Fig. 4: is a longitudinal sectional View through the same.

Referring now to the drawing in detail, 1 designates the floor of the mill mounted on sleepers 2, while 3 indicates the carriage adapted to travel upon the track 4. The log deck is indicated at 5 and the log way at 6, 7 designating the toothed or nigger bar. These parts may be of any ordinary construction and arranged in any desired manner.

My improved cushion stop comprises a substantially rectangular plate 8 formed with a longitudinal way 9 through which the upper. end of the nigger bar extends and within which such bar works. This plate is disposed, preferably, adjacent to the upper end of the nigger bar below the log deck and is formed with a depending flange 10 surrounding the slot or way 9 therein. The rear end of the plate 8 is formed with outwardly projecting ears 11, 11 disposed at opposite sides of the longitudinal center line of the plate and formed on the upper edges of the ears 11, 11 and projecting upwardly therefrom are webs 12.

Connected with the forward edges of the webs 12, is the interconnecting member of a substantially 'U-shaped yoke 13, such yoke having the limbs thereof disposed at the 0pposite sides of the longitudinal center line of the slot 9. The inner walls of the limbs of the yoke 13 and the contiguous portions of the side walls of the slot 9 and flange 10 diverge outwardly toward the rear end of the plate to form a dovetailed way 1 1 and seated within the way 14 is an abutment block 15 composed of wood or analogous material and having the forward face thereof cut on LD-jIlGllIlELtlOll, as at 16, corresponding with the inclination of the nigger bar when the latter is at the rear end of the slot 9.

Pivoted between the ears 11 and projecting rearwardly from the plate 8 is a rod 17 passed through an aperture 18 formed in a vertically disposed stop plate 19 anchored in gains or grooves formed in the log deck.

Encircling the rod 17 between the rear end of the plate 8 and the stop plate 19 is a shock absorbing spring 20, while encircling the rod at the opposite side of the stop plate and alining axially with the spring 20 is a second shock absorbing spring 21 having one end thereof abutting the stop plate 19 and the opposite end engaging a washer 22 surrounding the rear extremity of the rod 19 and held thereon by means of jam nuts 28.

From the foregoing description taken in connection with the accompanying drawing, the construction, mode of operation and manner of employing my improved cushion ing device will be readily apparent. In the forward movement of the nigger bar, such bar engages the forward end wall of the slot 9 in the plate 8 thereby sliding the plate 8 forwardly against the action of the shock absorbing spring 21. In the aft move inclined face 16 of the abutment block and so slides the plate 8 in a rearward direction against the action of. the shock absorb ing spring 20. By means'of the bl0ck.15 jarring of the parts incident to the impact between the nigger bar and the block is eliminated.

While I have herein shown and described one preferred form of my invention by way of illustration, I Wish it to be understood that I-do not limit or confine myself to the precise details of construction herein described and delineated, as modification and variation may be made Within the scope of the claim Without departing from the spirit of the invention.

1 claim:

' In a cushioning device for nigger bars, a

plate capable of sliding, movement and having a longitudinal slot formed therein to receive the nigger bar, a flange depending f romisaid plate contiguous the side and end Walls of the slot therein, ears projecting rearWardly from said plate, tension means connected With said ears, Webs uprising from said ears, a substantially U-shapedyoke connected With the forward-end edges of said Webs and having the limbs thereof disposed at the opposite sides of'the slot in to receive the impact of theqnigger barin the aft movement thereof.

In testimony whereof I afiix my signature in presence of two Witnesses;

WILLIAM A; HARROLD.

' Y lVitne'ssesi:

R. N. DARNER, THEODORE HART.

Copies of this patent may be obtained for five cents each; by'addressing the" Commissioner of Patents,

Washington, D. 03-" l 

